package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // 对前面传来的密码进行MD5加密
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     * @return
     */
    @Override
    public void insert(EmployeeDTO employeeDTO) {
        //1.把DTO对象转换为实体类对象
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);

        //2.补充实体类缺少的其他属性
        employee.setStatus(StatusConstant.ENABLE);//状态默认为1，启用状态，用常量，代码可维护性好
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));//设置默认密码为123456
//        employee.setCreateTime(LocalDateTime.now());//补充创建时间
//        employee.setUpdateTime(LocalDateTime.now());//补充修改时间
//        employee.setCreateUser(BaseContext.getCurrentId());//补充
//        employee.setUpdateUser(BaseContext.getCurrentId());//补充

        //3.调用方法
        employeeMapper.insert(employee);
    }

    /**
     * 分页查询员工
     * @return
     */
    @Override
    public PageResult query(EmployeePageQueryDTO employeePageQueryDTO) {
        //利用PageHelper插件完成分页查询
        //设置查询页码，每页显示几条数据
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());

        Page<Employee> page = employeeMapper.query(employeePageQueryDTO);
        long total = page.getTotal();
        List<Employee> records = page.getResult();
        return new PageResult(total,records);
    }

    /**
     * 员工账号状态设置
     * @param status
     * @param id
     * @return
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        //利用bulider构造器来生成对象
        Employee employee = Employee.builder()
                .id(id)
                .status(status)
//                .updateTime(LocalDateTime.now())
//                .updateUser(BaseContext.getCurrentId())
                .build();
        employeeMapper.update(employee);
    }

    /**
     * 根据id查询员工
     * @param id
     * @return
     */
    @Override
    public Employee queryById(Long id) {
        return employeeMapper.queryById(id);
    }

    /**
     * 编辑员工
     * @param employeeDTO
     * @return
     */
    @Override
    public void modify(EmployeeDTO employeeDTO) {
        //把DTO对象转换为实体类对象
        Employee employee = new Employee();

        BeanUtils.copyProperties(employeeDTO,employee);

        //补充其他属性
//        employee.setUpdateTime(LocalDateTime.now());
//        employee.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.update(employee);
    }
}
